Feats

Boon of Bountiful Health

Prerequisite
Level 19+
Ability Score Increase
+1 to any ability score (max 30)
Source
FRHoF

You gain the following benefits.

Augmented Health

When you gain Temporary Hit Points, increase the number of Temporary Hit Points you gain by 5.

Superior Recuperation

When you spend one or more Hit Point Dice to regain Hit Points, you can instead use the highest number possible for each die.